Add support for ipv6 only cluster via "enable_ipv6only_stack_networks" (#11831)

tests/files/vagrant_ubuntu24-calico-ipv6only-stack.rb

@@ -0,0 +1,9 @@
+$os = "ubuntu2404"
+
+$vm_cpus = 2
+$libvirt_volume_cache = "unsafe"
+
+# Checking for box update can trigger API rate limiting
+# https://www.vagrantup.com/docs/vagrant-cloud/request-limits.html
+$box_check_update = false
+$network_plugin = "calico"

tests/files/vagrant_ubuntu24-calico-ipv6only-stack.yml

@@ -0,0 +1,11 @@
+---
+# Instance settings
+cloud_image: ubuntu-2404
+mode: default
+
+# Kubespray settings
+enable_ipv6only_stack_networks: true
+kube_network_plugin: calico
+etcd_deployment_type: kubeadm
+kube_proxy_mode: iptables
+enable_nodelocaldns: false

tests/testcases/030_check-network.yml

@@ -7,7 +7,7 @@
     # TODO: source those from kubespray-defaults instead.
     # Needs kubespray-defaults to be decoupled from no-proxy stuff
     bin_dir: "/usr/local/bin"
-    kube_pods_subnet: 10.233.64.0/18
+    kube_pods_subnet: "{{ 'fd85:ee78:d8a6:8607::1:0000/112' if (enable_ipv6only_stack_networks | default(false)) else '10.233.64.0/18' }}"
 
   tasks:
 
@@ -115,7 +115,7 @@
               | length == 2
 
     - name: Curl between pods is working
-      command: "{{ bin_dir }}/kubectl -n test exec {{ item[0].metadata.name }} -- curl {{ item[1].status.podIP }}:8080"
+      command: "{{ bin_dir }}/kubectl -n test exec {{ item[0].metadata.name }} -- curl {{ item[1].status.podIP | ansible.utils.ipwrap}}:8080"
       with_nested:
       - "{{ pods }}"
       - "{{ pods }}"

tests/testcases/040_check-network-adv.yml

@@ -51,7 +51,7 @@
       block:
         - name: Get netchecker agents
           uri:
-            url: "http://{{ ansible_default_ipv4.address }}:{{ netchecker_port }}/api/v1/agents/"
+            url: "http://{{ (ansible_default_ipv6.address if (enable_ipv6only_stack_networks | default(false)) else ansible_default_ipv4.address) | ansible.utils.ipwrap }}:{{ netchecker_port }}/api/v1/agents/"
             return_content: true
             headers:
               Accept: application/json
@@ -64,7 +64,7 @@
 
         - name: Check netchecker status
           uri:
-            url: "http://{{ ansible_default_ipv4.address }}:{{ netchecker_port }}/api/v1/connectivity_check"
+            url: "http://{{ (ansible_default_ipv6.address if (enable_ipv6only_stack_networks | default(false)) else ansible_default_ipv4.address) | ansible.utils.ipwrap }}:{{ netchecker_port }}/api/v1/connectivity_check"
             return_content: true
             headers:
               Accept: application/json